In a project, you need to scale up the number of instances of a particular containerized application based on increased demand. How would you achieve this using Kubernetes?
- Deploy multiple independent pods for each instance
- Implement a custom script to monitor and scale containers
- Manually update the replica count in the Kubernetes Deployment
- Use Kubernetes Horizontal Pod Autoscaling
Kubernetes Horizontal Pod Autoscaling is the preferred method to automatically scale the number of instances based on demand. It dynamically adjusts the number of pods in a deployment, ensuring optimal resource utilization.
What is Blue-Green Deployment in the context of CI/CD?
- A cloud storage service
- A container orchestration tool
- A deployment strategy
- A version control system
Blue-Green Deployment is a deployment strategy used in CI/CD. It involves having two identical environments, with one active (Blue) and the other inactive (Green). The new version is deployed to the inactive environment, and the switch is made to make it live. This approach reduces downtime and allows quick rollback if issues arise.
Which HTTP request method should be used for idempotent operations that do not modify resources?
- DELETE
- GET
- POST
- PUT
The GET method should be used for idempotent operations that do not modify resources. GET requests are considered safe and idempotent, making them suitable for operations that retrieve data without causing side effects on the server.
Which phase of the SDLC involves gathering requirements from stakeholders?
- Design
- Implementation
- Requirements Gathering
- Testing
The phase that involves gathering requirements from stakeholders is the Requirements Gathering phase. It focuses on understanding and documenting the needs and expectations of the end-users and other stakeholders.
_______ is a server-side language commonly used for building scalable web applications and APIs.
- Node.js
- PHP
- Python
- Ruby
Node.js is a server-side language commonly used for building scalable web applications and APIs. It allows developers to use JavaScript on the server-side.
You're tasked with implementing a backup strategy for a highly sensitive database. Outline the key considerations and steps you would take to ensure robust backup and recovery processes.
- Define backup retention policies based on regulatory requirements
- Encrypt backup data to enhance security
- Implement a multi-tiered backup approach (full, incremental, differential)
- Regularly test backup and recovery processes
To ensure robust backup and recovery processes for a highly sensitive database, implementing a multi-tiered backup approach is essential. This includes full, incremental, and differential backups, providing a comprehensive strategy for data protection and efficient recovery.
Which cryptographic protocol is commonly used for securing network communications?
- FTP
- HTTP
- SSH
- SSL/TLS
SSL/TLS (Secure Sockets Layer/Transport Layer Security) is a cryptographic protocol commonly used to secure network communications, providing a secure channel over an insecure network. It ensures the confidentiality and integrity of data during transmission.
What does Git branching allow you to do?
- Clone a repository
- Delete files in a repository
- Track changes in a repository
- Work on different features simultaneously
Git branching allows you to work on different features simultaneously. It enables developers to create independent branches for each feature or bug fix, allowing for parallel development without affecting the main codebase.
Which SQL command is used to change data in a database?
- UPDATE
- MODIFY
- ALTER
- CHANGE
The SQL command used to change data in a database is UPDATE. It modifies the existing records in a table. The other options (MODIFY, ALTER, CHANGE) are used for different purposes in SQL.
In MongoDB, _______ is used for querying documents.
- JavaScript
- Query Language
- SQL
- find() Method
In MongoDB, the find() method is used for querying documents. It provides a flexible and powerful way to retrieve data from the database.